why socket.disconnect() on client side doesn't fire disconnect event on the server?

here’s my code:

client-side

 var socket = io.connect('http://' + serverAddress ,{ reconnection: false, forceNew: true  }  );

 socket.emit('monitorAddedNotify' , { video: sourceVideo , socketId: socket.id});

 socket.on('disconnectThatSoc', function(){
    socket.disconnect();
});

server-side:

  io.on('connection', function (socket) {
    console.log('a user connected');


    socket.on('disconnect', function () {
        console.log('user disconnected');
    });
 });

the socket.disconnect() method doesn’t work why?

[Ehsan666x]

are you dumb? you are waiting for an emit on client but no emit on server. fuck out of here

[GlitchBork]

That’s some real negative energy, Ehsan666x.